CVE-2022-30050Public exploitNetwork attack vector

Remote reflected script execution via member confirmation

Published May 16, 2022 · Updated Aug 3, 2024

Cross-site scripting in Gnuboard 5.55 and 5.56 allows remote attackers to execute script in a victim's browser via bbs/member_confirm.php. The member_confirm.php handler reflects attacker-controlled request data into the generated HTML response without adequate output encoding. Exploitation requires a victim to follow or submit a crafted request; executed script can read or alter data available to that user's web session, while no service interruption is reported.

CVSS severity6.1
Medium
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Gnuboard 5.55 and 5.56 allows remote attackers to execute script in a victim's browser via bbs/member_confirm.php. The member_confirm.php handler reflects attacker-controlled request data into the generated HTML response without adequate output encoding. Exploitation requires a victim to follow or submit a crafted request; executed script can read or alter data available to that user's web session, while no service interruption is reported.

The record

CVE
CVE-2022-30050
Published
May 16, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 16, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NVDAV:N/AC:M/Au:N/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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